Merge duplicated material assets #136
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Avatars processed by VRCFury (I think only when using material property toggles?) have their material assets duplicated for each mesh. This results in multiple copies of materials that can be identical, preventing them from being merged when they otherwise should be.
This change deduplicates identical material assets, allowing existing logic to merge renderers and material slots that use them.
I have not extensively tested this change aside from basic test cases, but I have been using it for five months without any apparent issues.